Safety device for locks



Dec. 15, 1925- 2 Sheets-Sheet 1 e. KOMARCSEVITS ET AL SAFETY DEVICE FORLOCKS Filed Jan. 13, 1925 FIG. 1

FIG. 3

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Dec. 15,1925. 1,566,021

' G. KOMARCSEVITS ET AL. I

SAFETY DEVZCE FOR LOCKS Filed Jan. 13, 1925 2 Sheets-Sheet 2 FIG. 5

FIG. 9

MVQJa Patented Dec. 15, 1925.

UNITED STATES GEORGE KOMARCSEVITS AND FRANK G. NUNN, OF CLEVELAND, OHIO.

SAFETY DEVICE FOR LOCKS.

Application filed January To (LU iii/1,0121, it may concern.

Be it known that we, Gnome Koriancsnv1 s and FRANK G. NUNN, citizens ofthe United States of America, residing at Cleveland, in the county ofCuyahoga and State of Ohio, have invented certain new and usefulImprovements in Safety Devices for Locks, of which the following is aspecification.

This invention relates to certain new and useful improvements in safetydevices for looks and has for its primary object to pro vide a safetydevice adapted. to be removably positioned within a key hole opening ofa door lock to pr vent the positioning of the key in the opening forattempted unauthorizing operation of the lock struc ture.

A further object of the invention is to provide a safety device forlooks that emodies an obstruction positionable in a key opening slot ofthe type operable from the inner and outer sides of the door and whereinthe lock tumblers are out of alinement with the key hole slot with aspecial type of positioning key for placing the safety device inposition against unauthorized removal and also for removing the samewhen it is desired to operate the lock mechanism.

\Vith the above and other ob'ects in view that will become apparent as te nature of the invention is better understood, the same consists of thenovel form, combination and arrangement of partshereinafter more fullydescribed, shown in the accompanying drawings and claimed.

In the drawings, wherein like reference characters designatecorresponding parts throughout the several views,

Figure 1 is a vertical longitudinal sectional view through a portion ofa door and casing with a portion of the lock casing broken away with thesafety device positioned in the key hole slot,

Figure 2 is an edge elevational view of the door, partly broken awayand. shown in section with the side and positioning key in the lockstructure with the key ready for removal and disengagement from thesafety device,

F'gure 3:3 is a horizontal sectional view taken on line III-III of Fig.2.

Figure 4: is a horizontal sectional view, similar to Fig. 3 showing thesafety device partially removed. fromv the lock,

13, 1925. Serial No. 2,101.

Figure 5 is a side elevational view of the safety device with thepositioning key disengaged therefrom,

Figure 6 is a side elevational view, similar to Fig. 5, partly brokenaway and shown in section with a portion of the positioning keyoperatively engaging the safety device,

Figure 7 is an edge elevational view of the safety device,

Figure 8 is a vertical cross-sectional view taken on line VIIIVIII ofFig. 5, and

Figure 9 fragmentarily illustrates side and end elevations of thepositioning key.

Referring more in detail to the accompanying drawings and particularlyto Fig. 1, there is illustrated a door 1 having a lock casing 2 embeddedin one edge thereof, the door moving into engagement with the frame 3and so retained by the latch 4. The lock casing 2 is of the type thathas the comparatively large unobstructed key receiving slot 5 with thetumbler mechanism 6 of the lock spaced upwardly of the slot 5 as shownin Figs. 1 and 2.

The principal object of the invention is to place an obstruction orsafety device in the key receiving slot 5 to prevent the entrance of akey in the slot for unauthorized operation of the lock mechanism.

and the safety device embodies a cylindrical shank 7 that carries alateral ward 8 spaced from the ends of the shank as shown in Figs. 5 and6. A plate 9, preferably formed of sheet metal that is folded uponitself to form a cylindrical barrel 10 is rotatably supported on theother end of the shank 7, fingers 11 carried by one of the platesections as shown in Figs. 5 and 7 being bent over the other platesection to retain the same in position.

To retain theplate 9 upon the shank 7, the latter is, provided with anannular shoulder 12 that is engaged by the adjacent edge of the barrelportion 10 of the plate and said barrel portion has one side thereof cutaway or provided with an opening 123 into which the pin 14- carried bythe'shank 7 extends as clearly shown in Figs. 5 and 8. the pin 14engaging the adjacent side wall of the opening 13 to retain. the outeredge of the barrel portion in engagement with the shoulder 12.

The plate 9 is resiliently maintained in adjusted position by the springfinger 15 carried by the lower edge wall. of the openiii) ing 18 andselectively engaging either of the flat faces 16 upon the shank 7 asshown in Figs. 5 and 6.

The outer end of the shank 7 within the barrel portion 10 of the plateis reduced as at 17 and has an outwardly directed pin carried therebyadjacent its inner end. The positioning key 19 includes a tubular shankhaving a bayonet slot 20 in its outer end, the outer end of the keyshank being received on the reduced end 17 of the shank 7 forpositioning the pin 18 in the bayonet slot 20.

\Vith the ward 8 and plate 9 disposed in alinement as illustrated inFigs. 5 and 6, the positioning key is engaged with the reduced end 17 ofthe shank 7 of the safety device and the latter is positioned in the keyslot 5 as shown in Fig. 4, the ward 8 being located in the lock casing 2while the plate 9 lies in the key slot 5 at one side of the door. Uponrotating the positioning key, the shank 7 is rotated to dispose the ward8 in a horizontal plane while the plate 9 remains vertically positionedin the key slot 5. The safety device is then completely moved into thelock casing and the forward end of the shank 7 is received in theopposite key slot as shown in Figs. 3 and 4 to provide a bearing andsupport for the safe ty device, and upon a further rotation of thepositioning key 19 the ward 8 is vertically positioned while the plate 9is horizontally disposed as shown in Figs. 1 to 3. A partial reverserotation of the position key 19 will disengage the pin 18 from thebayonet slot 20 of the key and permit withdrawal of the latter. With thesafety device supported in the key opening of the lock structure theinsertion of a skeleton key or the like for purposes of operating thelock mechanism will be prevented. In removing the safety device from thelock, the key 19 is engaged with the reduced end 17 to position theplate 9 in alinement with the adjacent key slot 5 to shift the safetydevice with the plate 9 into the adjacent key slot 5 and upon a reverserotation of the shank 7 the ward 8 will be alined with the key slot topermit ready removal of the safety device. If desired, the ward 8 may beconstructed in a manner for cooperation with the tumbler mechanism 6 ofthe lock structure and when positioned as illustrated in Fig. l mayeffect operation of the lock structure to release the bolt 4.

Vhile there is herein shown and described the preferred embodiment ofthe present invention, it is nevertheless to be understood that minorchanges may be made therein without departing from the spirit and scopeof the invention as claimed.

What is claimed as new is 1. A safety device for locks comprising incombination with a lock having opposite unobstructed key receiving slotstherethrough, a safety device embodying a shank having one end supportedin a slot at one side of the lock, a ward carried by the shank, a platerotatably supported on the shank and projecting laterally therefrom, apin projecting from the shank adjacent the plate, a positioning key forthe safety device having a tubular shank and bayonet slot in its sidewall to receive the pin and rotate shank to position the plate in ahorizontal. plane and the ward vertically, and means for retaining theplate in position on the shank including an annular shoulder on theshank, a portion of the plate bearing being cut away with one edge ofthe plate bearing engaging the shoulder and a pin carried by the shankwithin the cut away portion and engaging one side thereof to hold theplate bearing in engagement with the annular shoulder.

2. A safety device forlocks comprising in combination with a lock havingopposite unobstructed key receiving slots there through, a safety deviceembodying a shank having one end supported in a slot at one side of thelook, a ward carried by the shank, a plate rotatably supported on theshank and projecting laterally therefrom, a pin projecting from theshank adjacent the plate, a positioning key for the safety device havinga tubular shank and bayonet slot in its side wall to receive the pin androtate the shank to position the plate in a horizontal plane and theward vertically, the end of the shank inclosed by the plate beingreduced, said pin being housed by the bearing portion of the plate, andmeans for retaining the plate in position on the shank including anannular shoulder on the shank, a portion of the plate bearing being cutaway with one edge of the plate bearing engaging the shoulder and a pincarried by the shank within the cut away portion and engaging one sidethereof to hold the plate bearing in engagement with the annularshoulder.

In testimony whereof we ailix our natures.

GEORGE KOB'IARCSEVITS. FRANK G. NUNN.

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